I'd call this a rebus+ (complexity, visual components, lateral thinking). The answer is a letter.
Short story of the problem:
I was happy, I felt I finally invented something solvable, easy, and good. After telling the solution to my girlfriend, she frowned at me, and said: "This is not solvable, not easy and..not good. Sorry.." ... BUT I accept only opinions from PSE! So let's get started!
The unique rebus requires a unique hint. I hereby reveal the structure of he problem, let's see how it works in this company of problem solvers. It's virtually a biconceptual (and "games" related) unified context, where abstraction leads to word A and visual (multiple,redundant) clues lead to word B, where B⊆A and the solution is A\B.
The object (a game) and the "type" inside the object refers to word B, the "meaning" (and another game) will lead to word A. And then solve as per Hint1.
What's the difference between dog and god?